Mold-shell.



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*to a finished sand mold to retain dispense with the use of weights which are' rtlerieof. The pur ose of UNITED STATES PATENT orEIcE.I

JOHN E. WOOD, OF NEWARK, NEW JERSEY, AND DANIEL CURTIS EPRIHT, 0F SPRING CITY, PENNSYLVANIA, AssIeNons,

BY VJimena ASSIGNMENTS, To BRAM cox STOVE COMPANY, 0F PHILADELPHIA, yPENNSYLVANIA, A `CORPORATION OF PENN- SYLVANIA.

MOLD-SHELL.

A Specification of Letters Patent,

Patented Nov. 14. 1916.

To all 'whom it may concern.'

Be it known that we, 1) JOHN R. Woon and (2) DANIEL CURTIS EPRIGHT, both citi- Zeus of the United States, residing at (l) Newark and (2) Spring Cit in the counties of (l) Essex and (2) Chester, and States of (l) New Jersey and (2) Pennsylvania, have invented a certain new and useful Improveu ment in. Mold-@bells7 of which the following is a full, clear, and exact descriptign, reference being had to the accompanying drawings.

This invention relates to molding devices and more particularly to a retaining shell or slip-over jacket such as may be,4 applied A 4 the same until after the pourin operation. f

Itis theobject of t nis invention 'to provide sucha 'shell or jacket that is extremely convenient of application to molds; that will commonly employed for the purpose of taking care of the -vertical thrust or pressure within thegmold, due to the introduction of molten metal thereintoj also to provide a mold shell or slip-'over jacket which fits the mold accuratelyT and affords uniform protection, in all directions, against the pressures created within the mold by the introduction of molten metal thereinto, and is not liable to derangement with respect to the mold. y Still further, and more generally stated, the invention may be defined as consisting of the combinations of elements embodied in the claims hereto annexed and illustrated in the drawings accompanying and forming part hereof, wherein- Figure 1 represents a plan view of mmold having our mold shell applied-theretofiFig. 2 a side elevation of the same with parts broken away; and Fig. 3 an enlar d sectional detail corresponding to the Ime 3-3 of Fig. 2. y y

Describing the various arts by the use of reference numerals, 1 enotes the mold shell or casing which may be of any suitablematerial, metal beingA preferred. This shell is shown as frusto-pyramidal; ape and is provided with a series o/fslo/ 'fffrpem ings 2 in the upper portionffand 'a series of circular openings 3 in lower portion hese openings is d, and thetwogseres will m ventilata the mo be so arranged that one will be located above and the other below the parting line between the mold sections a and b, whereby pressure along this parting line will be resisted by the full strength `of the shell.

4 denotes a pair of latches which are pivoted to opposite ends of the mold shell, each latch having a hooked end 5 which is adapted to pass beneath and support the bottom board 6, whereby the shell not only incluses the mold but forms, with the bottom board, a support wherein and whereby the mold maybe transported;

It will be observed mold shell is bulged that the bottom of the outwardly, as .shown .at 17 providing an outwardly projecting chamber 8 at the bottom of the shell.

This construction provides aV space for any/sand thatY my be accidentally shaved from the mold during the (application of the Vshell thereto, thusA allowing the shell to rest squarely upon the bottom board and to lit the mold uniformly and snugly, without the provision of any lines of weakness along which the molten metal might flow, anr1 thus result in the production of an uneven casting. lt will be observed further that'the top of the mold `shell is pxlovided, on opposite sides thereof, with a plurality of holes 9, which holes are-threaded for the reception of machine screws 10, said machine screws securing the cross bars 11 in place. cross bars extend the full width of the mold shell, and by the arrangement of the holes 9- may be adjusted, as occasion may require, to clear the sprue hole 12;' These bars su port the upper mold section a, against t e internal pressure yto which it is subjected when the mold is poured' and dispense with the weights which are usually employed.

' As previously stated, the openings 2 and 3 are for the purpose of ventilati thejnold and, as will be observed from Fig. 2, 'they are separated by a solid wall 1 whlch covers the parting linebetween the'mold sections a and b, whereby the mold is eectively tected against rupture along itsparting from the internal .pressure'fcreated by the moltenmetal.` i l It is very essential; as mentioned herein before, that the mold shell should accurately /t the mold so that. the mold can not yieldl These y tno ics

the exact sha e and size of the molds over which the mo d shell is to be used, and by this pattern the mold shell is tested. 1 To facilitate this Work, we find it advisable to make the mold shell in sections which may be ilassembled abbut the aforesaid pattern and tried and altered until they exactly fit the same. i

In the embodiment of oury invention shown in the accompanying drawing, each wall of the shell represents one of the sections, and one end of each of the sections is provided with a flan re'l which cverlies the adjoining end 14 o theL adjacent section. The overlyin parts are held together by bolts 15 whic have tapered heads 16 that are counter-sunk within the inner face of the end 14, nuts 17 being applied to the bolts 15 for firmly dra-wing the parts together. It will be seen from an inspection of Fig. 3 that notwithstanding the joints between the various sections, the inner surface of the mold shell is substantiallj7 continuous.

Having thus described our invention, what we claim is 1. As a new article of manufacture, a' mold shell having a substantially open top, bars extending across said top, and eonnecting means between said bars and said top permittin the said bars to be adjustably secured to t e top.

2. As a new article of manufacture, a mold shell having latches pivoted to opposed walls thereof, said latches having projections adapted to engage and project beneat a bottom board, said shell having an ou wardly projecting chamber at the bottom of the wall thereof, and bars extending across and adjustably connected t the tgp thereof.

3.` s a new article of manufacture, a mold shell comprising a plurality of sec tions, means for securing the sections tggether, latches pivoted to opposed sections,

said latches having projections adapted to engage and project beneath a bottom board, the said board forming with the bottom of each section an outwardlyextending chamber, and bars extending across and adjustably connected to the tops of opposed sections'. A

4. A pouring frame for molds having continuous tapered side walls arranged to surround the mold, said frame being open at the top and bottom and having fianges at both the top and bottom and having vertical slots in the side walls; and latches pivotally mounted at opposite sides of the frame and arranged to engage the bottom board when the frame is placed over the meld.

5.- As a new iarticle of manufacture, a mold shell having the bottom of its wall projected outwardly, a. bottom board for said shell, and means for securing the board to the shell in engagement with the outwardly projecting portion of said wall whereby the bottom board forms a chamber with .such portion of the wall.

6. As a new article of manufacture, a mold shell the Wall whereof is tapered from the top to the bottom and having its lower end projected outwardl a bottom board for the said shell adaptedI to engage the out- Wardly projected bottom of said Wall and to form therewith a chamber, and means for securing the bottom board in engagement with the outwardly projected portion of Said wall.

In testimony whereof, wev hereunto affix our signatures in the presence of two witnesses.

Witnesses:

SAMUE P. WATSON, .W M A. Panama. 

